Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Feb. 01, 2032	Dec. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Document Period End Date	Jun. 30, 2018
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market fund	$ 10.8		$ 11.6
Derivative assets	36.9		18.0
Derivative liabilities	78.9		114.0
non derivative hedging instrument	0.0
Business Combination, Contingent Consideration, Liability, Noncurrent	115.0		114.0
Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market fund	10.8		11.6
Derivative assets	0.0		0.0
Derivative liabilities	0.0		0.0
non derivative hedging instrument	0.0
Business Combination, Contingent Consideration, Liability, Noncurrent	0.0		0.0
Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market fund	0.0		0.0
Business Combination, Contingent Consideration, Liability, Noncurrent	0.0		0.0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market fund	0.0		0.0
Derivative assets	0.0		0.0
Derivative liabilities	0.0		0.0
non derivative hedging instrument	0.0
Business Combination, Contingent Consideration, Liability, Noncurrent	115.0		114.0
Scenario, Forecast [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Noncurrent		$ 114.0
Not Designated as Hedging Instrument | Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	36.9		18.0
Derivative liabilities	78.9
non derivative hedging instrument	924.5
Derivative Liability, Fair Value, Gross Liability	$ 1,003.4		$ 114.0